Product Details: The Hadley Leveling Valve with Dump is a durable and reliable valve designed to provide equalized load conditions for truck, bus and trailer applications. Made of Engineering Grade Plastic, this valve is designed to last longer than the competition. It features an easy-to-use air suspension system that allows you to inflate and deflate the air suspension to ensure the load is evenly distributed. This valve is perfect for those who need a reliable and long-lasting solution for their truck, bus or trailer. With its easy-to-use design and durable construction, it is the perfect choice for your application. FleetPride is your First Click in Heavy Duty®.